Malicious PDF — malware analysis report

Static analysis result for SHA-256 74171f16fd78faf3…

MALICIOUS

PDF

78.6 KB Created: 2021-09-02 17:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac425ea099d348f167b23f15472f9d13 SHA-1: 886d279eeffb191636cd54ef4eac20ec2a3f382b SHA-256: 74171f16fd78faf3ae4320d24350cab649690e962554ddfb8bf71459c3eab6f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/uplcv?utm_term=what+is+summative+evaluation+pdf
    • https://gulf-rope.com/images/bulk_images/files/26986007869.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dm74eeum5ludgbb7tvst5ojp45/34591906314.pdf
    • https://catbasailing.com/upload/fck/file/dewitiwofekemibiluvogog.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609edec877718---91711804783.pdf
    • https://oykufestivali.com/ckfinder/userfiles/files/ridepejarixi.pdf
    • http://rc-modeller.se/images/file///tafokejafujajevilib.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/bexegesisekewomemef.pdf
    • http://aite-materials.com/upfiles/file/19349311193.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afc1950a3d---90076747474.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608b758ced54d---25326063383.pdf
    • https://swapnauraan.com/ckfinder/userfiles/files/72241808242.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16123806eeff27---kepupatupitetewososi.pdf
    • http://stattus.com/assets/file/19891476256.pdf
    • http://biometria.pl/photos_fck/file/nugixofax.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cuumd59n9mm9jvociu6d9ttss1/gemurufokeporifusaxesepi.pdf
    • http://moscowprice.com/content/xuploadimages/file/vozafam.pdf
    • http://stainless-faucet.com/uploads/htmlupload/files/femijujir.pdf
    • http://splogservice.ru/content/file/24446148365.pdf
    • http://palaciodelosnavas.com/userfiles/file/50619820522.pdf
    • http://vanillasky-ch.com/images/files/dikis.pdf
    • http://haustechnik-hagenauer.at/65970671067.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f2f962533e---15459372207.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 16792 bytes
font_01_sfnt_off0000eb02.bin
119573b5745fe2b63ced8b09e89b1a1b57a99dde9a7fe414573795454e57b44d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 10824 bytes
font_02_sfnt_off000103d2.bin
e3d691d6a5ddb81a680b4a54ac60b94301dfdc9183acea01ee616a12a4bd052b
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 16136 bytes